1 00:00:15,31 --> 00:00:21,78 The machines used by the machinist are called Machine tools thousands of things we 2 00:00:21,78 --> 00:00:26,79 use every day are made with them or they are used in making other machines 3 00:00:26,79 --> 00:00:30,77 that make bicycles electric motors gasoline engines. 4 00:00:31,43 --> 00:00:36,10 In fact most of the necessities and comforts of our modern lot. 5 00:00:36,12 --> 00:00:41,01 Although machine tools work on metals they have a familiar cousin in a familiar 6 00:00:41,01 --> 00:00:43,80 machine the wood working late. 7 00:00:43,82 --> 00:00:45,87 The basic features of the design 8 00:00:45,87 --> 00:00:50,11 and of the operation of the woodworking lathe in the home or school shop. 9 00:00:50,49 --> 00:00:53,92 Are much the same as lathes used for machining methods. 10 00:00:54,72 --> 00:01:00,24 In addition the woodworking lathe does with wood what some machine tools do with 11 00:01:00,24 --> 00:01:00,48 metal. 12 00:01:01,03 --> 00:01:06,40 It also demonstrates one of the five basic ways in which metal is formed by the 13 00:01:06,40 --> 00:01:11,07 machine. 14 00:01:12,22 --> 00:01:18,00 On this engine lathe The Machinist is producing a cylinder from a steel bar in much 15 00:01:18,00 --> 00:01:18,90 the same manner. 16 00:01:18,92 --> 00:01:24,84 Our home craftsman was with the wooden cylinder in his woodworking later this 17 00:01:24,85 --> 00:01:31,06 fundamental method of machining metal is called turning in this case a perfect 18 00:01:31,06 --> 00:01:37,75 cylinder all the exact diameter is being made by the machine that's the tool to cut 19 00:01:37,75 --> 00:01:44,23 so the steel bar acts in much the same way as the chisel did in cutting the wood in 20 00:01:44,23 --> 00:01:50,46 the wood working late in the drill press demonstrates the second way in which metal 21 00:01:50,46 --> 00:01:51,19 is machine. 22 00:01:51,34 --> 00:01:57,83 It is a simple machine tool in which a drill produces a hole in the piece of steel. 23 00:02:02,31 --> 00:02:05,79 In addition to drill presses the engine Laden 24 00:02:05,79 --> 00:02:12,43 and other more complicated machines are also used to produce holes of all sizes in 25 00:02:12,44 --> 00:02:17,46 metal a milling machine. 26 00:02:17,72 --> 00:02:24,72 Sometimes is used to produce flat surfaces this third method of machining metal is 27 00:02:24,72 --> 00:02:31,67 called milling in addition to producing flat 28 00:02:31,67 --> 00:02:36,30 surfaces milling machines also are used to cut the gear teeth of a 29 00:02:39,10 --> 00:02:44,67 machine tool called a shape or may be used when surfaces are to be made flat 30 00:02:45,41 --> 00:02:50,65 and this fourth way of working metal is called planing in the shape 31 00:02:50,65 --> 00:02:56,29 or the work is stationary on another machine called the planer the tool is 32 00:02:56,29 --> 00:02:59,34 stationary while the work is moved back 33 00:02:59,34 --> 00:03:06,09 and forth grinding is the fifth way to machine metal there are many kinds 34 00:03:06,09 --> 00:03:07,80 of grinding machines 35 00:03:07,80 --> 00:03:14,30 and many types of grinding operations through the use of an abrasive 36 00:03:14,30 --> 00:03:19,76 wheel are flat or even a round surface of extremely smooth finish 37 00:03:19,76 --> 00:03:23,08 and of great accuracy may be produced 38 00:03:31,17 --> 00:03:36,50 no matter where he works in the shop the machinist must know how to read blueprints 39 00:03:37,44 --> 00:03:41,47 and they show him the shape of the machine parts or other article he has to make 40 00:03:41,47 --> 00:03:45,60 and its exact dimensions and in order to be sure 41 00:03:45,60 --> 00:03:51,17 that whatever he is making corresponds to the blueprint the machinist must measure 42 00:03:51,17 --> 00:03:58,14 it with tools such as these outside calipers he must learn to use 43 00:03:58,14 --> 00:03:59,95 them skillfully and accurate. 44 00:04:00,00 --> 00:04:02,37 Some measuring tools are simple 45 00:04:02,37 --> 00:04:07,24 or they may be more complicated like the micrometer skill of thousands. 46 00:04:12,82 --> 00:04:19,01 One of the introductions to shop work for the beginner is bench work piling metal 47 00:04:19,01 --> 00:04:21,48 to size for example not of a skill 48 00:04:21,48 --> 00:04:28,41 that can be learned through practice scraping is another type of bench 49 00:04:28,41 --> 00:04:32,72 work to learn this hand operation long practice 50 00:04:32,72 --> 00:04:39,33 and great skilled is required because extremely accurate surfaces as specially on 51 00:04:39,33 --> 00:04:45,17 machine parts may be produced in this manner beginners in the machinist trade 52 00:04:45,17 --> 00:04:50,89 usually start work on a production job where they do the same type of work each day 53 00:04:52,05 --> 00:04:57,80 if they work on an automatic machine a little skill is required on semi automatic 54 00:04:57,80 --> 00:05:03,91 machines like this through a lathe more skilled is required of the operator the 55 00:05:03,92 --> 00:05:07,97 most nothing of the tools he is employing and of their function 56 00:05:07,97 --> 00:05:11,29 and operation in order to operate his machine properly. 57 00:05:11,59 --> 00:05:15,36 He may even have to measure his work to check on its accuracy 58 00:05:16,71 --> 00:05:20,89 when he learns how to set up work in the machines he is operating the student 59 00:05:20,89 --> 00:05:26,15 machinist may be promoted to the position of setup man or line Foreman 60 00:05:26,15 --> 00:05:28,59 and set up work in the machines 61 00:05:28,59 --> 00:05:37,34 or the less experienced operator a 62 00:05:37,35 --> 00:05:39,57 more advanced type of the set up man 63 00:05:39,57 --> 00:05:44,08 and Machinist is one who can set up jobs in several types of machines 64 00:05:45,18 --> 00:05:49,39 or who is qualified to operate several different kinds of machines. 65 00:05:50,40 --> 00:05:52,39 He is a general machinist 66 00:05:53,28 --> 00:05:58,44 when he becomes skilled in the operation of all types of machines knows their parts 67 00:05:58,44 --> 00:06:02,77 and how they operate. The Machinist the works constantly to better himself. 68 00:06:03,23 --> 00:06:08,38 Maybe come a maintenance man the maintenance man in the large shop. 69 00:06:08,58 --> 00:06:13,72 Not only keeps machines in perfect mechanical condition through routine repairs 70 00:06:14,51 --> 00:06:18,67 but he may also make parts for the machines in his care. 71 00:06:19,78 --> 00:06:26,22 This requires skill just a step short of the tool maker highly specialized machines 72 00:06:26,22 --> 00:06:31,74 are developed for use in many large industrial plants usually to do one particular 73 00:06:31,74 --> 00:06:38,23 job or type of work. Some are enormous and others are of ordinary side. 74 00:06:38,41 --> 00:06:42,00 Some require a high degree of skill to operate 75 00:06:42,00 --> 00:06:48,81 and others may be entirely automatic many of them present complicated work 76 00:06:48,81 --> 00:06:49,92 for set up 77 00:06:49,92 --> 00:07:00,07 and maintenance man the 78 00:07:00,08 --> 00:07:03,92 tool maker is a highly skilled and experienced machinist. 79 00:07:03,97 --> 00:07:07,95 He may work within a half a thousandth of an eon. A space. 80 00:07:08,05 --> 00:07:09,27 No bigger than a hair 81 00:07:09,27 --> 00:07:13,51 and making the original samples of a new job the shop is to produce 82 00:07:14,38 --> 00:07:16,42 or in making precision tools 83 00:07:16,42 --> 00:07:21,27 that the machine a service shop will use in producing some large scale production 84 00:07:21,27 --> 00:07:26,03 job tool makers may work in either the small job shop 85 00:07:26,03 --> 00:07:29,61 or they may have the best paying jobs of the biggest shop. 86 00:07:29,95 --> 00:07:36,73 Skill in all phases of the machinist craft last experience are necessary before one 87 00:07:36,73 --> 00:07:41,06 can become a tool maker closely akin to the tool maker in skill 88 00:07:41,06 --> 00:07:46,65 and in precise work is the die maker frequently the same man who makes tools will 89 00:07:46,65 --> 00:07:51,18 make dies or in both jobs this ability to work accurately 90 00:07:51,18 --> 00:07:55,29 and precisely is essential long training 91 00:07:55,29 --> 00:07:59,35 and experience lie behind both the tool maker and the die maker. 92 00:08:00,00 --> 00:08:03,65 The experience tool or die maker who gains of full 93 00:08:03,65 --> 00:08:05,77 and complete knowledge of his trade 94 00:08:05,77 --> 00:08:11,99 and those machines may be karma tool designer knowledge of machine principles 95 00:08:11,99 --> 00:08:17,72 and of higher mathematics are necessary in the Xining machine parts tools 96 00:08:17,72 --> 00:08:19,11 and. 97 00:08:25,50 --> 00:08:30,47 The small job shop offers an opportunity to gain experience with various types of 98 00:08:30,47 --> 00:08:33,72 machines to learn the fundamentals of the machine a scratch 99 00:08:34,86 --> 00:08:39,21 or one can begin as a helper to an experienced machinist in a larger shop. 100 00:08:39,38 --> 00:08:40,51 It is in this manner 101 00:08:40,51 --> 00:08:45,16 that many apprentices in big manufacturing plants begin in addition to their work 102 00:08:45,16 --> 00:08:50,06 in the planet machines apprentices attend classes in mathematics machine design 103 00:08:50,06 --> 00:08:56,61 and sign school machine shops offer another 104 00:08:56,61 --> 00:08:59,08 opportunity for learning the machinist trade. 105 00:08:59,29 --> 00:09:02,91 If you learn decimals and simple arithmetic in the classroom. 106 00:09:03,01 --> 00:09:06,64 If you like to work with your hands if you like to make things. 107 00:09:06,87 --> 00:09:11,40 If you are not afraid of oil grease and dirt. If you like machinery. 108 00:09:11,62 --> 00:09:15,09 You can become a machinist with 109 00:09:15,10 --> 00:09:21,44 that simple background you can obtain a fairly good job day 110 00:09:21,45 --> 00:09:24,14 or night trade schools either public 111 00:09:24,14 --> 00:09:29,66 or the reliable private trade schools offer a sound background in machine shop 112 00:09:29,66 --> 00:09:34,10 practice this is supplemented by classes and mechanical drawing 113 00:09:34,10 --> 00:09:37,34 and the simple arithmetic of fractions and their equivalents 114 00:09:37,34 --> 00:09:43,98 that will enable one to become a skilled machinists the school drafting room will 115 00:09:43,98 --> 00:09:48,96 teach you to read through print something you must know as specially if you want to 116 00:09:48,96 --> 00:09:53,09 become a designer the designer must know I or mathematics 117 00:09:53,09 --> 00:09:57,02 and the tool maker Most knows something of how they apply to his work 118 00:09:57,73 --> 00:09:59,83 and both most people abreast of. 119 00:10:00,00 --> 00:10:04,50 Every new development in machine practices and machine design. 120 00:10:05,51 --> 00:10:09,78 If you can develop your manual and mental skills to do a job accurately 121 00:10:09,78 --> 00:10:12,93 and well with a machine tool if you want to learn 122 00:10:12,93 --> 00:10:15,02 and are ready to start at the bottom. 123 00:10:15,26 --> 00:10:21,59 If you are not afraid of hard work then the machinist trade offers you opportunity 124 00:10:21,59 --> 00:10:35,69 for your life work.